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-The Delirium Killer-

Once feared as an unprecedented killer in the human world, he was born with the ability "Physical Boost". With a powerful body, he drifted through heavy labor jobs―unable to find purpose, sinking into hollow days.

One day, a demon summoned from another realm appeared before him. Small yet radiating menace, it offered an item called the "Arcana of Delirium", granting him intoxicating power and ecstasy. Corrupted by it, he donned a hockey mask to conceal his face and began a spree of violence across the land.

His rampage soon drew attention, and a task force of espers moved to stop him. After a fierce battle, he was defeated, and his life ended―

But the soul of an esper does not perish. It was fated to rise again in another world.